LGB COMMERCIAL GAS BOILER. Versatile combustion control systems. Made with Weil-McLain quality COMMERCIAL GAS BOILER APPLICATIONS INCLUDE:

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1 COMMERCIAL GAS OILER Series Gas Water or Steam MH: 400-,860 Efficiency 85.% Net Load Range: Hot Water 80-, MH / Steam 975-7,40 Sq. Ft. COMMERCIAL GAS OILER APPLICATIONS INCLUDE: Apartment uildings Commercial uildings Schools and Other Institutions Multiple oilers Indirect-Fired Water Heating And Much More Versatile combustion control systems Made with Weil-McLain quality

2 DESIGN ADVANTAGES Cast Iron Sections Section Seal sections are made of durable cast iron for long life. It s not uncommon for Weil-McLain cast iron boilers to last 35 years or more. Modern elastomer sealing rings in the port openings assure a watertight seal. ecause of the elasticity of the seals (unlike metal push nipples), they fill any gap caused by imperfections in the port openings, misalignment of sections, or expansion and contraction. Sections are not face ground; the tough outer skin is retained to protect against corrosion. The sections are studded with heat pins that cause the hot gases to swirl about, scrubbing the entire surface for greater heat transfer and maximum operating efficiency. Combined with short draw rods, sealing rings also permit faster section assembly. Lugs and sockets assure proper section alignment during assembly; the machined surfaces of the port openings control the compression ratio of the rings. Sealing Rope Rear Cleaning Sealing rope between the sections assures a permanent, gastight seal. When installed, the rope is visible between sections so the boiler can be checked for tightness. Sealing rope a standard feature of Weil-McLain commercial boilers allows for expansion and contraction of the sections, is impervious to heat and moisture, will not crack and will last the life of the boiler. Removing the rear jacket panel and steel cleanout plates expose the flue passages for inspection and cleaning. Factory-Assembled ase and urners The insulated, galvanized steel base houses the gas manifold and one-piece, high tempurature aluminized steel burners. These burners feature efficient performance, excellent flame characteristics, and quiet ignition and extinction. urners provide fixed primary air no adjustment required for approved gases. One burner/base assembly and one gas train are furnished for the -4 through, and two each for the -3 through 3.

3 FEATURES ADVANTAGES ENEFITS 85.% combustion efficiency saves energy. The is the highest efficiency cast iron atmospheric gas boiler available. Exceeds efficiency requirements of ASHRAE 90.. Cast iron sections for corrosion resistance and long life. Compact design saves valuable space only 50⅜ high, allowing more headroom for piping and venting. Patented section sealing method, short draw rods and sealing rope section speed assembly to reduce installation time. Extra-large 9 top port opening forms an internal header for better water circulation. Large steaming area assures rapid generation of dry steam. AGA design certified for natural and propoane gas. Ratings certified by Air-Conditioning, Heating and Refrigeration Institute (AHRI) for natural and propane gas. Factory-assembled gas train located within the boiler jacket. (Except for all IRI boilers and - through 3 boilers with CSD-/FM.) All -6 through 3 boilers (except for all IRI and -) are capable of low-high-low or staged firing with an additional operating limit control. 3 Factory-assembled base and burners reduce installation time. Simplified piping. The largest steam boiler requires only two risers. uilt-in air separator in water boilers. Air is diverted to the expansion tank through a tapping next to supply outlet. Steel jackets with durable powdercoat finish in WeilMcLain blue completely insulated designed for fast installation. 0 Year Limited Heat Exchanger Warranty. Covers cast iron sections.

4 IR I 33 RI - I 5 CS D- -3 &F M SD - CS 3 D C D- 5 CS 3 AG - A AG 3 A & -0 FM AG 6A & FM AG 4A& 5 FM De s of cript M Co ajor ion mp on en ts COMUSTION CONTROL SYSTEM OPTIONS Manual Main Shutoff Valve Diaphragm Gas Valve w/reg. & Pilot Takeoff Diaphragm Gas Valve Diaphragm Gas Valve Stage w/regulator Motorized Gas Valve w/actuator (On/Off) Low Gas Pressure Switch High Gas Pressure Switch Normally Open Solenoid Vent Valve Manual Leak Checking Gas Valve Leak Test Cock 4 3 Pilot Shutoff Cock Pilot Solenoid Valve Pilot Regulator UCS Control Module Flame Guardian Control System CSD Control Panel WMC A Control Panel WMC A Control Panel For detailed information: Page 5 Page 6 Page 7 OPTIONAL WFFP CONTROL PANEL FOR STANDARD (AGA) AND CSD- SYSTEMS FOR 6-3 PANEL FEATURES 4 Main flame failure lockout. 4 indicator lamps: call for heat, pilot proven, main flame proven, and flame failure (8 lamps on WFFP - panel). Isolated alarm contact to indicate flame failure. Power-on switch, fuse(s), and terminal strip. Optional flame failure alarm bell.

5 STANDARD COMUSTION CONTROL SYSTEMS STANDARD (AGA) AND FM CONTROL SYSTEMS FOR 4-5 UNIVERSAL CONTROL SYSTEM FEATURES: One Weil-McClain UCS ignition control module and wire harness are furnished as standard equipment with each base assembly. On a call for heat, the UCS produces a spark to ignite the pilot. When the pilot flame is proven, the main gas valve opens with a built-in, slow opening soft ignition. In the event the pilot is not proven during a timed trial for ignition, the UCS control system will provide 00% shutoff. After a timed 5-minute delay, another ignition sequence will automatically be initiated. The control system has been certified by AGA and all components are UL Listed. FACTORY-ASSEMLED GAS TRAIN: The gas train allows for fast and easy installation. A slowopening, soft ignition, high capacity, combination gas valve is used on the 4-5 boilers. STANDARD (AGA) CONTROL SYSTEMS FOR 6-3 AND FM CONTROL SYSTEMS FOR 6-0 WFG FLAME GUARDIAN CONTROL SYSTEM FEATURES: A pre-wired WFG control system consisting of a mounting plate, two Weil-McLain UCS control modules and terminal block are furnished as standard equipment with each base assembly. On a call for heat, the pilot proving control module provides a spark to ignite the pilot. When the pilot flame is proven, the first stage of the two-stage gas valve opens and all burners light on low fire. When the main flame sensor proves carryover, the second stage of the gas valve opens and the burners go to high fire. In the event the pilot or main flame is not proven during a timed trial for ignition, the WFG control system will provide 00% shutoff. After a timed 5-minute delay, another ignition sequence will automatically be initiated. The control system provides multiple ignition trials. The control system design has been certified by AGA and all components are UL Listed. LOW-HIGH-LOW FIRING: 6-3 boilers can provide low-high-low firing with the addition of a water temperature or steam pressure control. FACTORY-ASSEMLED GAS TRAIN: The gas train allows for fast and easy installation. A dual gas valve train has an on/off diaphram valve and a low-high-low regulated gas valve. 5

6 ADDITIONAL COMUSTION CONTROL SYSTEMS CSD- SYSTEMS FOR 5 CONTROL SYSTEM FEATURES: A pre-wired control panel with one ignition control module, a manual reset relay with indicator light and a terminal block are furnished as standard equipment with each base assembly. On a call for heat, the control module produces a spark to ignite the pilot. When the pilot flame is proven, the combination gas valve opens with a built-in, slow opening soft ignition. Upon two consecutive pilot flame failures, the control module will trip the manual reset relay and illuminate the red lockout light. The lockout condition(s) should be corrected before pressing the red reset button to reset the boiler. The control system has been certified by AGA and all components are UL Listed. CSD- SYSTEMS FOR 6-0 CONTROL SYSTEM FEATURES: A pre-wired control panel with one pilot-proving module, one main flame proving module, a manual reset relay with indicator light and a terminal block are furnished as standard equipment with each 6- boiler. For 30, two pre-wired control panels are provided, one for each base. On a call for heat, the pilot-proving module, one main flame proving module, a manual reset relay with indicator light and a terminal block are furnished as standard equipment with each 6- boilers. For 3-0, two prewired control panels are provided, one for each base. Upon two consecutive pilot flame failures or on failure to sense main flame, the control module will trip the manual reset relay and illuminate the red lockout light. The lockout condition(s) should be corrected before pressing the red reset button to reset the boiler. For 3-0, the control systems for each base will operate independently of each other. The control system has been certified by AGA and all components are UL Listed. 6

7 CSD- AND FM CONTROL SYSTEMS FOR -3 AND IRI CONTROL SYSTEMS FOR 5-3 CONTROL SYSTEM FEATURES: A pre-wired WMC control panel is furnished as standard equipment. The gas train is located outside the boiler jacket. On a call for heat, the pilot control circuit produces a spark and opens the pilot solenoid allowing the pilot to ignite. For 3-3, the universal ignition control then produces a spark to ignite the pilot on the second base. After the pilot(s) has been proven, the flame safeguard control energizes the main flame circuit allowing the main burners to ignite at low fire. The main pilot is then de-energized and the main flame sensor proves the main burner operation at low fire. For 3-3, the pilot on the second base continues to burn during the boiler on cycle. The flame safeguard control then energizes the downstream gas valve allowing the boiler to fire at high fire. If the pilot or main flame are not proven during the start-up sequence, then the flame safeguard control will lock out on safety. A red indicator light and alarm bell will energize. The lockout condition should be corrected and then the red reset button should be pressed to restart the boiler. The control system will permit a normal start up after an automatic 5-minute delay. The control system has been certified by AGA and all components are UL Listed. WMC CONTROL PANEL FEATURES: Proven main flame with interrupted pilot for main base; pilot is extinguished after 0-second trial for ignition. For two-base boilers, the second base has an intermittent pilot; the pilot on second base continues to burn during boiler on cycle. Pre-purge timer to provide 5-minute enforced wait after flame failure. Flame failure alarm bell. 7 Five indicator lamps: power on, call for heat, pilot on, main flame on, and flame failure. High-low fire control terminals. Low-high-low fire may be provided with a water temperature or steam pressure control. Flame safeguard primary control. Power-on switch, pilot-on switch, main-flame-on switch, alarm silencer switch, fuse and terminal strip.

8 PIPING CONNECTIONS WATER OILERS PIPING NOTES: Alternative Piping-for -4 through only: If desired, all three piping connections (supply, return and expansion tank) can be taken off same end of boiler. Supply and return sizes in table below for water boilers refer to minimum size of pipe connected to boiler for 0 or higher temperature drop between supply and return. Recommended Minimum Pipe Sizes (0 Rise Through oiler) oiler Model Pipe Size Supply and Return -4 " -5 ½" -6 through 8 3" -9 through 6 4" -7 through 3 5" STEAM OILERS Recommended Minimum Pipe Sizes For Single Risers Riser A Header H -4 through 8 4" 4" " -9 through 5" 5" ½" - 6" 6" ½" oiler Model Equalizer J Recommended Minimum Pipe Sizes For Dual Risers 8 oiler Model Riser A Header H Equalizer J -3 through 5 4" 4" 6" 4" -6 through 9 5" 5" 6" 4" -0 through 3 6" 6" 8" 4"

9 STANDARD, ADDITIONAL AND OPTIONAL EQUIPMENT STANDARD EQUIPMENT, ALL UNITS: Cast iron sections Insulated extended jacket Aluminized steel collector hood(s) and draft hood(s) Control transformer (0/4v) Factory-assembled burner and base unit(s): One-piece aluminized steel burners Gas manifold Aluminized steel base panels Hi-temp insulated board Wiring harness: junction box and pre-wired flexible conduit STANDARD EQUIPMENT, -4 and 5: Intermittent electronic ignition systems (UCS): Intermittent ignition control module Electronically supervised pilot burner with ignition electrode and flame rod Wire Harness STANDARD EQUIPMENT, -6 thru 3: Flame guardian panel with flame rectification electronic control system for each base assembly: Pre-wired control panel - Terminal block - Two ignition control modules having integral spark generators - Intermittent electronic ignition pilot system - Electronically supervised pilot burner with ignition electrode and flame rod - Main flame sensor rod STANDARD EQUIPMENT, WATER OILERS: Combination operating and high limit temperature control ( -4 thu 0 only) Operating temperature control ( - thru 3 only) High limit temperature control ( - thru 3 only) Combination pressure temperature gauge 30 PSI ASME relief valve-side outlet uilt-in air eliminator in end sections Probe-type low water cutoff, PS-85-0 (packaged only) STANDARD EQUIPMENT, STEAM OILERS: Operating pressure control High limit pressure control Compound presure-vacuum gauge Gauge cocks, glass and guards 5 PSI ASME relief valve-side outlet Float-type low water cutoff, MM no. 6 LWCO 9 ADDITIONAL EQUIPMENT WFFP control panels ( -6 thru 3) WMC control panels ( -5 thru 3) Probe-type low water cutoff, ps-85-0 (non-packaged water only) Factory-assembled sections ( -4 thru 4 only) Fire-tested packaged unit ( -4 thru 4 only) ½" Inspection tappings with brass plugs two for each section 80 PSI working pressure test of sections Water level controls and low water cutoffs Low-high-low firing ( -6 thru only) Stage firing ( -3 thru 3 only) Energy management control systems (CP panels) IRI, FM and CSD- control systems Natural gas to propane gas conversion kit W-M and PLUS indirect-fired water heaters W-M Maxiflo pool heaters W-M brazed plate heat exchangers WFFP CONTROL PANEL EQUIPMENT STANDARD: WFFP - Panel ( -6 Thru ) WFFP - Panel ( -3 Thru 3) 30-second time delay relay (two on WFFP -) Two 4-volt DPDT relays (four on WFFP -) Terminal block Fuse (two on WFFP -) Toggle switch Four Indicator lamps (eight on WFFP -) ADDITIONAL: Alarm bell and transformer for remote indication of flame failure Alarm bell panel mounted WMC CONTROL PANEL EQUIPMENT STANDARD: WMC -A panel ( -5 thru ) WMC -A panel ( -3 thru 3) Motorized gas train Interruptible pilot (intermittent pilot for adjacent base and additional control module) Pre-wired control panel: - Flame sefeguard primary control - Pre-purge control timer - Relay(s) - Terminal block - Fuse (two on WMC -A) - Four toggle switches - Five indicator lamps - Alarm bell

10 DIMENSIONS Front View Right View Dimensions (inches) Model Left View A C W Draft Hood Outlet(s) Number & Size " -5 3 ½ 6 -" " ½ 36 -" " ½ 46-4" " ½ 56-6" " ½ " ½ 7 -"/ -4" " ½ 37½ 8-4" ½ " "/ -6" " ½ 47½ 0-6" ½ " ½ -6" " Notes: () For 4-3-return tapping size is 5" (qty. ) and supply tapping size is 6" (qty. ). () Gas trains on all IRI boilers and -3 for CSD- & FM are located outside the boiler jacket. Allow additional clearances as required. 0

11 CONTROL TAPPING TALE Location Left End Right End Size Steam Water (4) C C ¼" oiler Drain oiler Drain D & D D3 & D4 ½" Gauge Glass (3) E & E E3 & E4 " Low Water Cutoff (3) Optional Low Water Cutoff Left View E E3 " Pressure Operating & Limit Controls & Pressure Gauge F F " Limit Control () To Expansion Tank or Automatic Air Vent () G G 3/4" Operating Control () H & H () H3 & H4 () ⅜" Tri-cock J J " Steam Relief Valve & Skim Tapping K K ½" Water Relief Valve and Skim Tapping Combination Pressure & Temperature Gauge () M & M M3 & M4 " Optional Low Water Cutoff (3) Optional Low Water Cutoff Right View M M3 " Firing Rate Control (when used) Firing Rate Control (when used) or Probe Low Water Cutoff Notes: () Available on special request only. () Must be on same side as supply to system. (3) Must be on same side as steam equalizer piping. (4) Additional controls for water boilers may be placed in supply piping. oiler Model Notes: No. of Gas Trains () Rated pressure for -3 CSD- & FM is 5.5" W.C. Standard AGA CSD- & FM IRI 5" W.C. 7" W.C No. of Gas Trains 5" W.C. 7" W.C No. of Gas Trains 5.5" W.C. 7" W.C. -4 " -5 " " " " ¼" " -6 ¼" " ¼" " ¼" " -7 ¼" " ¼" " ¼" " -8 ¼" " ¼" " ½" ¼" -9 ¼" " ¼" " " ¼" -0 ½" ¼" ½" ¼" " ¼" - " ¼" " ¼" " ½" - " ¼" " ¼" " ½" -3 ¼" " ¼" " " ½" -4 ¼" " ¼" " " ½" -5 ¼" " ¼" " " ½" -6 ¼" " ¼" " " ½" -7 ¼" " ¼" " " ½" -8 ½"/ ¼" ¼"/ " ½"/ ¼" ¼"/ " ½" ½" -9 ½" ¼" ½" ¼" ½" " -0 ½"/ " ¼" ½"/ " " ½" " - " ¼" 3" " 3" " - " ¼" 3" " 3" " -3 " ¼" 3" " 3" "

12 oiler Model Number () Heating Medium Input MH () AHRI Certified Ratings (3) Gross Output MH () Net Rating Steam MH () oiler N.P. RATINGS STEAM Sq. Ft. Steam oiler Water Content Gallons Steam (to waterline) Approx. Shipping Weight Lbs. Assembled lock Weight Complete Packaged oiler Weight Water (gallons) Models P (4) Chimney reeching Size (I.D) (inches) (5) -4-S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam S Steam oiler Model Number () Heating Medium Input MH () AHRI Certified Ratings (3) Gross Output Net Rating MH () RATINGS WATER Assembled lock Weight Complete Packaged oiler Weight Water MH () oiler H.P. oiler Water Content Gallons Approx. Shipping Weight Lbs. Models P (4) Chimney reeching Size (I.D.) Inches (5) -4-W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water W Water Notes: () Add to boiler number S" for Steam, W" for Water. () MH = thousands of TU/hour. (3) Net AHRI ratings are based on net installed radiation of sufficient quantity for building requirements. Do not add on for normal piping and pickup. Water boilers are rated at 80 psig maximum working pressure. Water ratings are based on piping and pickup allowance of.5. Additional allowance should be made for gravity hot water systems or unusual piping and pickup loads. Ratings shown are for elevations up to,000 feet. For ratings above,000 feet, reduce at rate of 4 percent per 000 feet above sea level. (4) Sling length is 5 feet; per boiler. (5) A twenty-foot (0') chimney height may be used in most cases, based on using a six-foot (6') length of connector for breeching of the size shown from the nearest draft hood outlet to the chimney or vent with not more than one () standard sloping-type 90 elbow. Consult the National Fuel Gas Code, ANSI Z3., for actual sizing. If individual vertical vents are to be used, each vent diameter should be the same size as the respective draft hood outlet and the height may be reduced to five feet (5') measured above the draft hood outlet. WM5_RO_07